Ink eradicator



May 31. 1927.

T. W- CAPPON INK ERADICATOR Filed March 8, 1924 m m n 4 W. 4

Patented May 31, 1927 THOMAS W. CAPPON, OF

BROOKLYN, NEW YORK.

INK ERADICATOR' Application filed March 8,

This invention relates \to ink erasers, and more particularly to fluid ink erasers.

The invention has for its objects, among others to provide a device that will both contain and dispense an erasing fluid; to provide such a device that it may be readily held between the thumb and fingers and to provide means of this character capable of use on the end of a fountain pen.

Several embodiments of the invention are shown in the drawings, in which Figure 1 is a. viewshowing the eraser applied to the cap of a fountain pen, parts being in section, the glass pencil being 1novable into and out of the container.

, Figure 2 is a cross sectional view on the line 22 of Figure 1.

Figure 3 is a view similar to Figure 1, showing a modification in which a capillary aperture runs through the glass pencil, and

Figure 4 is av cross sectional view on the line 4-4 of Figure 3.

Referring to the drawings for a detailed description, there is shown a cylindrical shell 1, which is preferably the cap of a fountain pen. In place of the customary integral covering there is a detachable cap '2, oflarger dimensions than the shell 1. Mounted within shell 1 is a glass container 3, sealed at one end by a rubber stopper 4, which supports at its center a glass collet 5 which has a cylindrical aperture therethrough. Any suitable container having an operating aperture for discharge of the fluid is within the invention. Mounted in the collet 5 is the glass pencil 6 provided with the curved enlargement 7 for engaging the surface of the paper and to facilitate grasping the pencil with the fingers.

\Vhen not in use, the cap 2 is in place and the pencil 6 is pushed all the way in, so that the exterior enlargement 7 entirely closes the operating aperture. To use the apparatus, the. cap is removed and the pen cil 6 is first drawn all the way out, until the interior enlargement acts as a stop. During this operation, air will enter around the pencil to occupy the space formerly occu-- pied by the pencil within the container. The apparatus is then inverted and the outer en- 1924. Serial No. 697,750.

largement 7 is brought in contact with the ink spot or mark to be eradicated, when, by.

pushing gently down, the pencil is again forced into the container. The interior displacement caused by this movement causes a rise in pressure within the container which forces out an appropriate quantity of fluid around the pencil and down to the enlarge; ment in contact with the ink spot.

In the form shown in Figure 3 the glass pencil fits more tightly in the collet 5.' Running through the pencil 6 is a capillary tubehaving the aperture 9 opening into the container 3 and the aperture 8 opening into the curved surface 7' of the writing end of the pencil.

In either of the forms shown the pencil is slidable freely through the operating aperture, 'by which is meant that the pencil maybe moved in either direction into any desired osition where it will remain. This distingulshes the present device from prior forms in which a spring is counted upon .to maintain the pencil in one normal position, and wherein action by displacement is not relied upon. Furthermore devices which rely upon springs for operation soon become quite useless, becauselof the chemical reaction between the ink eradicating fluid and the metal of the spring, whereby the efiectiveness of the fluid is impaired and the ,spring is corroded.

What is claimed is- 1. A fluid ink eraser, comprising in combination a container having a narrow operating aperture and a fluid apply ng penc1l extending in front of the outer orifice of the container and freely slidable' in said aperture and provided with an enlargement at its inner end adapted to limit outward movement of said pencil; said pencil being so proportioned to the container as to produce effective ejection of fluid by dlsplacement when pressed inward.-

2. A fluid ink eraser as in claim 1 wherein the-pencil is provided with enlargements at both ends to limit movement in both directions.

3:41 fluid ink eraser as in claim 1 wherein thefluid applying pencil is hollow and has an aperture communicating with the in terior of the container.

4. A fluid 1nk eraser eomprislng in c bmbination a-container having a narrow oper- 5 atingaperture and a slidable' fluid apply-' ing pencil having an external enlargement accessibie for manual operation whereby the THOMAS W. cAPPoN. 

